Door lock



Aug. 25, 1942- w. R. sczHlJvsrsl noon Loox Filed July 2, 1 940 5Sheets-Sheet 1 W M M T A ug. l25, 1942. w. R. scHLAE- DOOR LOCK FiledJuly 2, 1940 3 Sheets-Sheet 2 1 ENToR.

M 25 @mi ATTORNEY Aug; 25, 1942. w. R. scHLAGE DOOR LOCK Filed July 2,1940 Patented Aug. 25, 1942 DOOR. LOCK Walter R. Schlage, Burlingame,Calif., assignoi to Schlage Lock Company,

San. Francisco,

Calif., a corporation of California Application July 2, 1940, Serial No.343,570

23 Claims.

This invention relates to door locks of the type disclosed in my formerPatent No. 2,018,093, entitled Door lock, issued October 22, 1935, andespecially to improvements and additions to the structure theredisclosed.

'Ihe patent above referred to, briefly stated, embodies a door lockwhich is provided with an inner and an outer knob, a key-actuatedmechanism in the outer knobwhereby the door may be opened under certainconditions from the exterior, and a manually actuated member in theinner knobl for dogging the outer knob against operation and forsimultaneously displaying an indicator and obstructing the key passage,so as to prevent opening of the door from the outside except by the useof an emergency key.

The manually actuated member comprises a push button mounted in theinner knob. A bar is attached thereto, and this bar actuates theindicator, the key-obstructing means, and finally the dogging memberwhereby the outer knob is dogged against rotation. When the button isdepressed, no one can enter from the exterior except a person possessingan emergency key; hence if it is desired to permit entrance by anordinary key, the indicator and key-obstructing means must be releasedwithout releasing the dogging member. Such release is provided, as it isaccomplished by depression of a latch bolt.

The present invention relates to the dogging mechanism, the indicatorand the key-obstructing or shut-out mechanism of a lock of thischaracter, and the object is to simplify and improve the constructionand operation thereof; to provide two push buttons, one which actuatesthe dogging mechanism whereby the outer knob is dogged againstoperation, and a second button the indicator and the key shutout; toprovide two push buttons which are independently operable; and further,to provide means whereby one button, or both of them, may be released inunison by mere rotation of the inner knob, and one of them by depressionof the latch bolt.

The invention is shown by way of illustration in the accompanyingdrawings, in which Fig. 1 is a horizontal central longitudinal sectionof the lock showing it mounted in a door, said view showing the two pushbuttons extended;

Fig. 2 is a similar section showing one of the push buttons depressedand the second push button partially depressed;

Fig. 3 is a similar section showing both push buttons fully depressed;

Fig. 4 is a central longitudinal section taken at right angles to Fig.1;

Fig. 5 is a cross section taken on line V-V of Fig. 4; l

Fig. 6 is a perspective view of the main push button bar; l

Fig. '7 is a perspective View of the secondary push button bar;

Fig. 8 is a perspective view of a spring-retaining cage used inconnection with the main push button; 1

Fig. 9 is a perspective view, partially broken away, of the main pushbutton;

Fig. 10 is a perspective view of a pin retaining collar used inconnection with both push buttons;

Fig. 11 is a perspective view of the secondary push button.

Fig. 12 is a perspective view of the main push button bar'doggingmember;

Fig. 13 is a perspective view of the inner door knob spindle;

Fig. 14 is a perspective view of the dogging member whereby the outerknob spindle is dogged against rotation;

Fig. 15 is a perspective view of a spring seat used in connection withthe dogging member shown in Fig, 14;

Fig. 16 is a perspective view of the retractor;

Fig. 17 is a perspective view of the housing of a pin tumbler cylinderlock;

Fig. 18 is a perspective View of the indicator and the key shutoutplate;

Fig. 19 is a perspective view of a guide disc used in connection withthe key shutout plate;

Fig. 20 is a perspective view oa driver blade used in connection withthe pin tumbler cylinder lock; j

Fig. 21 is a perspective view of a retaining collar used in connectionwith the rotatable vcore of the pin tumbler cylinder lock; f

Fig. 22 is a perspective view of the outer door knob spindle; and Y Fig.23 is a perspective view of the key-actuated spindle. Y

Referring to the drawings in detail, and particularly Figs. 1 and 5, Aindicates in general a lock housing in which is mounted a retractor B,

- and C indicates a housing which carries a. latch bolt D, a retractorbar 2, to which the latch bolt is secured, and a spring 3 whichsurrounds the retractor bar and normally maintains the latchboltinprojected position. A f Y The lock housingindicated at A willhereinafter be referred to as the latch bolt actuating unit, and thehousing C as the latch bolt unit. The housing A, as previously stated,encloses and supports the retractor B, the housing is provided with twohub portions a-a and these form a support for the pair of spindles E andF. Each spindle is provided with a knob, one knob being indicated at 4and the other at 5. The knob 4 will hereinafter be referred to as theouter knob and the knob 5 as the inner knob. The knobs are suitablysecured to their respective spindles, and when either knob is rotatedthe cooperating spindle will be rotated. The inner knob spindle is shownin perspective in Fig. 13, and the outer knob spindle is shown inperspective in Fig. 22.

It will be noted by referring to Figs. 13 and 22 that the inner end ofeach spindle is provided with a rollback member, one such member beingindicated at E and the other at 6a. These rollback members engage theretractor B when the spindles are rotated, and impart an endwisemovement to the retractor within the housing, and during such movementalso impart endwise movement to the latch bolt D to cause retractionthereof, The retractor'B is best shown in Figs. 5 and 16. It consists ofspaced side plates l, on the outer surfaces of which are formedshoulders 8 and Ba. The side plates are connected attheir inner endsv bya central crossbar 9, and the outer ends terminate in crossbars I0 whichstraddle and engage lugs Illa formed on the inner end of theretractorbar 2- The rollback members formed on the inner ends of the respectivespindles will engage the respective shoulders 8 and 8a on opposite sidesof the retractor when' the spindles are rotated, and it is through thisengagement that endwise movement is imparted to the retractor and to theretractor bar 2, so as to retract the latchbolt D, projection of thelatch hereinafter be referred to as the key spindle, asv

itis rotated by means of a key-actuated mechanism only. This spindle isalso provided with a rollback member such as shown at 6b, and when thevspindle II is rotated by the key-actuated mechanism the rollback member6b engages the" shoulders 8a on the retractor and thus imparts endwisemovement thereto and to the retractor bar and the latch bolt D. Hence itis possible to retract the latch bolt either by the key-actuated spindleI I or by either of the knob-actuated spindles E and F. V

The door lock illustrated in the present instance is providedwith akey-actuated pin tumbler type. `of lock generally indicated at G (seeFig. 17). of the spindle F and is disposed within the knob 4 carriedthereby. The inner spindle E has two push buttons mounted therein whichare generally indicated at I4 and l5. These normally assume a projectedposition with relationto the end of the inner `spindle andk the knobcarried thereby, but they may be depressed for purposes hereinafter tobe described.

The key-actuated pin tumbler mechanism is of standard construction andrequires no particular explanation. It should suiiice to saythat itisprovided with a rotatable coregor cylinder plug I6 in which is formed akey pa'ssagefor the re- When this key is inserted, the plug I 6 may beThis lock isv mounted in the outer end which is formed a central'opening32.

mounted a crossbar I9 (see Fig. 18), which car- Akries two pinsindicated at 20 and 2.

Holes are drilled through the plug member I6 (see Fig. 1) for thereception of these pins. A spring 20a,

l cooperates with the pin 29 to normally maintain the crossbar I9 inengagement with the inner end of a driver blade 22, as will hereinafterbe described. The crossbar I9 functions as a key-obstructing or shutoutmember, as will later be more fully understood, while the pin 2|functions as an indicator.

The projecting inner end of the plug, which is slotted as'at I8, isthreaded on the exterior and carries a coupling collar 23 (see Figs. 4and 21), this coupling collar when applied being secured in any suitablemanner. Between the coupling collar and the end of the plug is disposeda washer 24. This has a cross-slot formed therein, as indicated at 25,and this slot functions as a guideand support for the driver blade 22which projectsV therethrough. The coupling member accordingly forms acoupling or connection between the rotatable coreand the driving blade22,- and as this projects into a disc 26 secured in the outer end of thekey spindle (see Fig. 23), and the disc is provided vwith a slot 2l, acoupling is formed not only between the core of the keyactuated pintumbler housing' and the driver blade, but also a coupling is made withthe key spindle. Hence when a key is inserted and the core rotated,rotational movement is transmitted to the driver'blade and by the driverblade to disc 26 and the key spindle, permitting retraction of the latchbolt, or in other words Yopening of the door from the exterior by meansof a key.

The inner spindle and knob, as previously stated,`icar`ry the two pushbuttons indicated at I4 and I5. Their' construction and operation willnow be described. First of all, itirnight be stated that the button IIIwill hereinafter be referred to as the'main button and the button I5 asthe secondary button. The main button is best shown in Fig. 9. It ispressed on or otherwise securedto a 'cage 'member shown in Fig. 8; the

v,portion onto which it is pressed is indicated at 2'I. This memberhas adisc-like base 28 with a central opening 23 formed therein, and it hastwo extending legs Sljfand an inner disc 3| in Also it is provided rwithAa radially extending lug 33. This member forms a `cage and a supportfor the main button I4. It is slidably mounted in the outer end of thespindle E, but it is held `against rotation by the lug 33 which extendsinto a slot formed in the spindle (see Fig. 1). A spring 34 normallymaintains the cage in a position where both buttons .are projected, thespring being interposed'between a stationary cross-plate 35, secured inthe spindle, and the inner end 3I of thel lcage. The main button I4 (seeFig. 9) has an annular inwardly-extending ange 36 lformed in its outerend. This flange forms a sleeve in which theA secondary button I5 issupported and in which it is guided, a flange ia on said button limitingoutward movement. The 'two buttons serve the function of impartinglongitudinal movement to a pair of bars such -as shown in Figs. 6 and 7.The bar shown in Fig. 6 is the main button :bar and is indicated Vby thenumeral 31, and the bar shown in Fig. 1 is the secondary button bar. Thelast named bar will be referred to by the numeral 38. The bar 31 isprovided with a Ipair of laterally extending shoulders 39, and the bar38 with a pair of laterally extending shoulders 39a. The bars extendthrough the inner spindle and the retractor, and partially into theouter spindle. The shoulders 39 and 39a engage the inner disc-shaped end3I of the main button supporting cage, and that limits their outwardmovement. The ends of the bars, which extend beyond the shoulders 39 and39a, both extend into the interior of the button I5. The extension onone bar, that is, the main bar 31, is slightly less than the extensionon the bar 38; hence when both buttons are extended the secondarylbutton will engage only the end of the bar 38. The bar 31 serves thefunction of actuating a dogging member 4I) (see Fig. 14) which isprovided with a radially extending dogging leg 4I. This dog serves thepurpose of dogging the outer spindle and knob against rotation. The bar38, on the other hand, functions.-

pressure, button I will follow with it, as the annular flange 36 on themain button engages the collar I5a on the button l 5. Hence by pushinginwardly on the main button both buttons will be depressed. As they moveinwardly the cage to which the main button is secured will also moveinwardly; hence the inward movement will be limited :by the lug 33traveling in the slot in the knob spindle. During this movement the end3| of the .cage will engage the shoulders 39 arl'd 39a of the respectivebars 31 and 38, and both bars Iwill accordingly be vmoved longitudinallyin the direction of arrow a (see Fig. 1).

Both bars are provided with aligning shoulders These are engaged by adog 43, and when engaged by said dog both buttons will be secured in thedepressed position. During the inward movement of the two bars intoengagement with the dog 43 the initier end yof the bar 31, which has ashoulder 31a formed thereon, engages the dogging member 40 and pushes itinto the inner end of the outer knob spindle. A slot is formed in thisspindle, as shown at 44. The dog 4I enters the slot and it also enters aslot formed in the housing A, thereby dogging the outer spindle againstrotation. The door may, however, be opened from the outside by means ofthe key shown at I1, as insertion of the key will permit rotation of thecore within the pin tumbler cylinder lock, and this will, through themechanism previously described, rotate the key spindle I I, which inturn will actuate the retractor and thereby retract the latch bolt andpermit opening of the door.

Such opening by means of a key can, however, be prevented by depressingthe second button I5. That is, both buttons, as previously described,are moved inwardly until the shoulders 42 of the respective bars 31 and38 are engaged by the dog 43. The button I5 may then be depressed asecond time, or moved a greater distance inwardly, such movement beingpermitted by slotting the bar at the point indicated at 45 (see Figs. 1and 7). When the bar 38 is moved by means of the inner button its innerend, or that indicated at 38a, will engage a button 41. .This buttonwill in turn engage the inner end oaf the driver blade= 22, and thedriver blade will in turn engage the: crossbar I 9 and thereby :forcethe same, together with the :pins 20 and 2 I, in an outward directiom.the position of these parts when. so actuated being' shown in Fig. 3.That is, Fig. 1 shows both but'- tons in the full extended position;Fig. 2 shows the two buttons depressed, and that means that the outerspindle and knob have been dog-ged against operation; while Fig. 3 showsthe button I5 further depressed, which means that the indicating pin 2Iprojects beyond the outer end of the [pin tumbler cylinder lock, `and italso means that the cross-plate I9 has been moved inwardly to laposition where it does not permit complete insertion of a key. It is forthis reason that it isreferred to as a key shutout member. In thisposition the outer knob and spindle are dogged against operation, theindicator is displayed, and 4no key 'can be inserted except an emergencykey; that is, the .usual key will be anormal key such las shown in Fig.4, which may be inserted to operate the .pin tumbler lock when it may befully inserted, but when the crossbar assumes the position shown in Fig.3 the key can not be fully inserted and thus can not actuate or releasethe pin tumblers to permit rotation of the core. An emergency key may,however, be provided which will release the pin tumblers and which maybe inserted when the crossbar` assumes the position shownI in Fig. 3.This emergency key of lcourse will only be in the possession of acertain individual, and is provided for emergency use only. The normalkey, however, is shut out at such times and can not be employed. v

Before describing the manner in which the buttons, together with thebars actuated thereby, are released and returned to normal position to.`

.permit normal operation of the lock, it is desired to describe theconstruction of the dog 43. This` dog is best shown in Fig. 12. Itconsists of a. substantially circular disc 43a, to one edge of which thedog 43 is attached. The disc has a central opening formed therein topermit the bars 31 and 38 to extend therethrough, and it has a radiallyprojecting lug 43h which projectsv into a guide slot in the spindle, soas to permit the dog to be rotated with the spindle when the spindle isrotated. The dog 43 is disposed at an angle with relation to the disc43a, and the disc rests on or engages the stationary cross-plate 35secured in the spindle (see Figs. 1, 2 and 3). The disc is engaged by aspring 43c which exerts a. continuous pressure thereon. When all partsarein normal position, the dog 43 rides on the edgesof the respectivebars 31 and 38, as shown in. Fig. 1, but when the bars are movedinwardly by means of the buttons the shoulders will be mov-ed. toposition beyond the inner end of the dog 43,. and this will then swinginwardly and engage behind the shoulders, thus preventing return of thebuttons and the bars.

To release the dog, so as to permit return of the buttons and bars tonormal position, it is necessary to rotate the inner spindle E by meansof the knob. During such rotation of the inner spindle, disc 43a towhich the dog is secured will also be rotated, as the lug 43b extendsinto a slot in the spindle. During such rotation the dog will swingtowards the iiat side of the bars, and thus swings out of engagementwith the shoulders, and when this happens, both bars are released andare returned to normal position by their respective springs. That islthe button 41.

is-actuated by a' spring- 47a. Hence when the bar 33 is releasedthespring Ha will push the-'but- :ton f41 against the dogging member 4D,and it will also exert pressurel on the end of the bar 38, therebyrestoring it to normalv position.

This spring alsoffunctions to move the dog 40 to released position,andas the dog'd engages the-shoulder 31a of the bar 31., this will alsoreturn to normal position. The main button will return to normalposition dueto the pressure of .the spring 34, and the button l willreturn to .normal position due to the pressure exertedby a vspring 41a.A collar I5d, by the vvay,` is shown .in-Figs. 1 and 10; it merelyserves as a closure "or cap to cover a pin |50 which extends through theslot 45 of the bar 38 and a hole-45a formed inthe bar 31, the collarbeing held in position by 1a.. spring l5b. This pin and cap or collarare employed for assembling purposes, that is, to retain ,the two barsin the cage of the main button during assembly of the lock parts; andthe pinalso serves the function of limiting inward movement of thebutton I5 with relation to the button 14,

Aisr-movedan added distance inwardly, the added distance being themovement of the button l5 when assuming the position shown in Fig. 3.

.'Hence, means must be provided for dogging or;

latching the bar 38 when it assumes its inner- 4most position. This isaccomplished by providing a latch, having two inwardly-extending arms50. This latch is carried by the retractor B, and 'it is held againstthe edges of the bars at all times by a spring 5l. 0n the side of thebars .adjacent the latch arms 50 are formed notches,

there being two notches 52 in the bar 3l' and two .notches 53 in the bar38. These notches are out of alignment at all times except when the bar38 assumes its innermost position. In that position thev notches 53align not only with the notches v52 but also with the latch arms 50, andthe latch :will accordingly move inwardly into said notches and dog orlatch both bars against release. 'Hence the dog 43 serves the purpose ofsecuring b'oth bars in their rst depressed position, and the latch 50serves the function of securing both vbars when the bar 3S assumes itsinnermost position. `Both bars are, however, simultaneously releasedwhen the inner knob and spindle are rotated, as such rotation will causethe rollback member. on the inner spindle to engage one of ithe sideshoulders 8 and -Sa of the retractor. When this happens the retractor ismoved inwardly, and when it moves inwardly latch 50 moves with it, andout of engagement with the notches 52 and 53, thus simultaneouslyreleasing both bars, and when these bars are released the outer spindlewill be undogged, the indicator will be retracted and so will the keyshutout member.

Plainly speaking, by providing two buttons, one button may be employedfor the purpose of dog- 1 ging the outer spindle against rotation, andthe ,second button may be employed for the purpose Aof .actuating theindicatorend the key shutout mechanism. The .operation of depressing theftwo buttons performs only one function; that is, it accomplishesdogging of the outer.. spindle.

Bothv buttons may be released from thisposition by rotating theinnerspindle by means ofthe knob. On theother hand, if both buttons aredepressed to the first'position, and then the second button is furtherdepressed, the outer knob will be dogged, the indicator will bedisplayed, and the key shutout will assume obstructing position. In thatposition both buttons andtheir bars Yare retained by the latch 50, andboth Vbuttons vand bars rare releasable by rotation of the inner knoband spindle. Hence it-is possible to release the main button when thisfunctionsonly to dog the outer spindle, and it is also. possible torelease both buttons when both have been depressed to their doggingpositions.

The main button and bar, as previously stated, serve the function ofdogging the outer spindle and knob against rotation, and when they aremoved or depressed to dogging position they are held in that position bymeans of the Adog 43; and as this can only be released by rotation ofthe inner knob and spindle, it becomes possible for a person leaving aroom to lock the door, as he or she in leaving-the room will only haveto depress the main button and then close the Idoor upon going out.During the closing of the door the latch bolt will engage the strikerplate and will be forced inwardly. Such inward movement is in no wayobstructive; that is, the bar 2 having the lugs Illa formed on its innerend (see Fig. 5) can move freely inwardly without imparting movement tothe retractor, but the lugs Illa will engage the arms of the latch 50and thereby force this inwardly. This member, as previously stated, ismovable independently of the retractor.

This is important, as will appear. If children are in a room, it ispossible that they-might open `thedoor and depress the main button andthereafter the secondary button, and then slam it as they leave theroom. If some means were not provided for releasing the secondary buttonfrom dogging position under such conditions, the door would bepermanently locked and could not be opened except by means of anemergency key. This is prevented in the present instance as follows:

If the secondary button is pushed inwardly afterl the main button hasbeen depressed, the bar connected therewith will extend the indicator,and at the. same time obstruct the key passage, thus making itimpossible for anyone to enter except the person in possession of theemergencyY key. When the secondary button and bar are thus depressed,they are secured in that position by the latch 50. During slamming orclosing of the door, the latch bolt will, as pre- -`viously stated, bedepressed. The bar 2, connected therewith and having the lugs I0a on itsinner end, will also be depressed, or in'other words, move inwardly, andwhen it does so, the lugs 10a, engage the arms of the latch 50, therebypushing `it inwardly. In so doing the secondary latch bar and button arereleased and they will .immediately return to inoperative position andother hand, a person may lock the door by merely depressing the mainbutton and then going out and closing the door; when a door is solocked, it can be opened by an ordinary key.

While certain features of my invention have been more or lessspecifically described and illustrated, I nevertheless Wish itunderstood that changes may be resorted to Within the scope of theappended claims.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. In a door lock a latch bolt, an inner and an outer actuator for thelatch bolt, a key-actuated mechanism operable from the outer side toretract the latch bolt, means on the inner side for rendering the outeractuator inoperative, and other and independently operated means on theinner side for rendering the key mechanism inoperative except by anemergency key.

2, In a door lock a latch bolt, an inner and an outer actuator for thelatch bolt, akey-actuated mechanism operable from the outer side toretractthe latch bolt, means on the inner side for rendering the outeractuator inoperative, o-ther and vindependently operated means on theinner side for rendering the key mechanism inoperative except by anemergency key, and means on the inner side for releasing the outeractuator and the mechanism which renders the key mechanism inoperative.

' 3. In aV door lock a latch bolt, an inner and an outer actuator forthe latch bolt, a key-actuated mechanism operable from the outer side toretract the latch bolt, means on the inner side for rendering the outeractuator inoperative, other and independently operated means on theinner side for rendering the key mechanism inoperative except by anemergency key, and means on the inner side for releasing, independentlyor in unison, the outer actuator and the mechanism which renders the keymechanism inoperative.

4. In a door lock a latch bolt, an inner and an outer actuator for thelatch bolt, a key-actuated mechanism operable from the outer side toretract the latch bolt, means on the inner side for rendering the outeractuator inoperative, other and independently operated means on theinner side for rendering the key mechanism inoperative except by anemergency key, an inner door knob, and means actuated by rotation ofsaid knob for releasing the outer actuator and the mechanism Whichrenders the key mechanism inoperative.

5. In a door lock a latch bolt, an inner and an outer knob, meansactuated by either knob for retracting the latch bolt, a key-actuatedmechanismin the outer knob for retracting the latch boltjmeans on theinner side of the lock for rendering the outer knob inoperative toretract the latch bolt,and other means on the inner side of the lock forrendering the key mechanism inoperative. Y

6.` In a door lock a latch bolt, an inner and an outer knob, meansactuated by either knob for retractingA the latch bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, means on theinner Vside of the lock for rendering the outer knob inoperative toretract the latch bolt, Vother means on the inner side of the lock forrendering the key mechanism inoperative, and means -actuated by rotationof the inner knob for releasing the outer knob and the mechanism whichrenders the key mechanism inoperative.

' 7. In a door lock a latch bolt, an inner and an outer knob, meansactuated by either-knob kfor retracting the latch bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in the inner knob for clogging the outer knob against operation,andY a second depressible button in .the inner knob for rendering thekey mechanism inoperative.

8. In a door lock a latch bolt, an inner and an outer knob, meansactuated by either knob for retracting the latch bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in the inner knob for dogging the outer knob against operation, asecond depressible button in the inner knob Vfor rendering the keymechanism inoperative; and means actuated by rotation of the inner knobvfor releasing both buttons to permit undogging of the outer knob andfor rendering the key mechanism operative.

9. In a door lock a latch bolt, an inner and an outer knob, meansactuated by either knob Vfor retracting the latch bolt, av key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in the inner knob for dogging the outer knob against operation, asecond depressible button in the inner knob for rendering the keymechanism inoperative, said buttons being depressible in unison andWhenso depressed dogging the outer knob against Voperation, said secondbutton adapted to be further depressed and when so depressed renderingvthe key mechanism inoperative, and means actuated by rotation of theinner knob for releasing' both buttons to permit undogging of the outerknob and for rendering the key mechanism operative.

10. In a door lock a latch bolt, an inner and an outer knob, meansactuated by either knob for retracting the latch bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in the inner knob for clogging the outer knob against operation,av

ently operable clogging members for securing the buttons in theirrespectivel depressed positions,

means actuated by rotation of the inner knob for releasing both dogs,and means for returning both buttons to normal position when released.

11.V In a door lock a latch bolt, an inner and an 'outer spindle, aretractor actuated by either spindle to retract .the latch bolt, akey-actuated mechanism in the outer spindle for retracting the retractorand latch bolt, a depressible button mounted in the inner spindle, aclogging member actuated by said button .to dog the outer spindleagainst operation, a second button in the inner spindle, means actuatedby said button for rendering the key mechanism inoperative, meansactuated by rotation of the inner spindle for releasing both buttons,and other means for returning the buttons to normal extended position.

` '12.A In a door lock a latch bolt, an inner and an outer spindle, aretractor actuated by either spindle to retract the latch bolt, akey-actuated mechanism in the outer spindle for retracting the retractorand latch bolt, a depressible button mounted in the inner spindle, a barconnected with said button and extending through the inner spindle andthe retractor,` a clogging member actuated by said bar to dog the outerspindle against rotation, asecondary depressible button mountedfwithintheflrst namedbutton, av second bar connected with the secondary buttonand extending through the inner spindle andthe retractor, means actuatedby said secondary bar for rendering the-key mechanism inoperative, saidbuttons adapted tobe depressed-in unison and when so depressed impartingmovement to both bars-and the rst named bar causing clogging of theouter spindle, av dogging member engaging bothbars and retaining themWhen moved by depression of both buttons, said last named dog releasingboth barswhen the inner spindle is rotated, andv springA means forreturning both bars and the connected buttons to normal position..

13. In a door lock a latch bolt, an inner and an outer` spindle, aretractor actuated by either spindle to retract the latch bolt, akey-actuated mechanism in the outer spindle for retracting the retractorand latch bolt, a depressible button mounted inthe inner spindle, a barconnected with said button and extending through the inner spindle andthe retractor, a clogging member actuated by saidrbar to dog the outerspindle against rotation, a secondary depressible button mounted Within.the first named button, a second bar'connected with the secondarybutton and extending through the inner spindle and the retractor, meansactuated by said secondary bar forrendering the-key mechanisminoperative, said buttons adapted .to be depressed in unison to impartinward-movement to both bars within the inner spindle, a dogging memberfor retaining the bars when moved, said` second button adapted to befurther depressed afterthe rst depression oi both buttons, so as toimpart further movement to the second bar, means forretaining the secondbarand button after the second depression, manually actuated means forreleasing both buttons and bars, and meansfor returning them to normalposition.

14. lIna door locka-latch bolt, an inner and an outer spindle, aretractor actuated by either' spindle tov-retract the latch bolt, akey-actuated mechanism in the outer spindle for retracting theretracterand latch bolt, a depressible buttonmounted in the innerspindle, a bar connected with said button and extending through theinner spindle and thevretractor, a dogging member actuatedby said bartodog-the outer spindle against rotation, a secondary depressible buttonmounted-withinthe rst named button, a second -barconnected with thesecondary button and extending through the inner spindle and theretractor, means vactuated bysaid secondary bar for rendering thekeymechanism inoperative, said-buttons adapted to be depressed in unison toimpart inward Vmovement to both bars Withinthe inner spindle, a cloggingmember for retaining; thebars when moved, said second button adapted tobe further depressed after the first depression-of both buttons, so astoimpart further movement to the second bar, means for retaining thesecond bar and button after the second depression, said depression ofthe buttons kin unison causing dogglng of the outer spindleonly and saidfurther depression of the secondary-` buttonrendering the key mechanisminoperative, means for releasing both buttons and bars-and` meansforreturning them to normal position.

15. In a door lock a latch bolt, an inner and an-outer knob-meansactuated by either knob for1 retracting the latch bolt, av key-actuatedmechanism in the outer knob for retracting the latch bolt, means on theinner side of the lock for rendering the outer knob inoperativetoretract the latch bolt, other means on the inner side of the lock forrendering the key mechanism inoperative, and means actuated by` side ofthe lock for rendering the key mechanism. inoperative, means actuated bydepression-of the latch bolt for releasing the means-Which render thekey mechanism inoperative, and means actuated by rotation of theinner-knob for releasing the outer knob.

17. In a door lock a latch bolt, an inner and an outer knob, meansactuated by either knob for retracting the latch bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in thev inner knob for clogging the outer knob against operation,a

second depressible button in the inner knob forV rendering the keymechanism inoperative, and means actuated by depression of the latchbolt for releasing the second depressible button only.

18. In a door lock a latch bolt, an inner and an outer knob, meansactuated by either knob forA retracting the latch bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in the inner knob for dogging the outer knob against operation, asecond depressible button in the inner knob for rendering the keymechanism inoperative, means actuated by depression of the latchbolt-for releasing the second depressible button only, and meansactuated by rotation of the inner knob for releasing the Vouter knob.

19. In a door lock, a latch bolt, an inner and an outer actuator for thelatch bolt, a key-actuated mechanism operable from the outer side toretract the latch bolt, means on the inner side for rendering the outeractuator inoperative, other and independently operated means on theinner side for-rendering the key mechanism inoperative except by anemergency key, and means actuated by depression of the latch bolt forreleasing said means to render the key mechanism operative.

20. In a door lock, a latch bolt, an inner and an outer actuator for thelatch bolt, a keyactuated mechanism operable-from the outer side toretract the latch bolt, means on the inner side for rendering the outeractuator inoperative, other and independently operated means on theinner side for rendering the key mechanism inoperative except by anemergency key, and means actuated by rotation of the inner actuator forreleasing the outer actuator and for simultaneously rendering the keymechanism operative.

21. In a door lock, a latch bolt, an inner and an outer actuator for thelatch bolt, a keyactuated mechanism operable fromA the outer side toretract the latch bolt, means on the inner side for rendering the outeractuator inoperative,

other and independently operated means on theV actuated by depression ofthe latch bolt for rendering the key mechanism operative but leaving theouter actuator inoperative.

22. In a door lock, a latch bolt, an inner and an outer knob, meansactuated by either knob for retracting the latch' bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in the inner knob for dogging'the outer knob against operation, asecond depressible button in the inner knob for rendering the keymechanism inoperative, and means actuated by depression of the latchbolt for releasing only the button which actuates the key mechanism.

23. In a door lock, a latch bolt, an inner and an outer knob, meansactuated by either knob for retracting the latch bolt, a key-actuatedmechanism in the outer knob for retracting the latch bolt, a depressiblebutton in the inner knob for dogging the outer knob against operation, asecond depressible button in the inner knob for rendering the keymechanism inoperative, said buttons being depressible in unison and whenso depressed clogging the outer knob against operation, said secondbutton adapted to be furthed depressed and when so depressed renderingthe key mechanism inoperative, and means actuated by depression of thelatch bolt for releasing the key actuating button only to render the keymechanism operative.

WALTER R. SCHLAGE.

